Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos % de casamentos entre pessoas do mesmo sexo existem para o ano de 2008?
 ###Tabelas: CREATE TABLE marriage_statistics (marriage_statistics_id AUTO_INCREMENT PRIMARY KEY, Year VARCHAR, Marriages between men INT, Marriages between women INT, Same-sex marriages INT, Total marriages INT, % same-sex marriages VARCHAR) CREATE TABLE german_championship_finals_under_the_gauliga_system (german_championship_finals_under_the_gauliga_system_id AUTO_INCREMENT PRIMARY KEY, Year INT, Champion VARCHAR, Runner-Up VARCHAR, Result VARCHAR, Date VARCHAR, Venue VARCHAR, Attendance VARCHAR) CREATE TABLE 1997_draft_picks (1997_draft_picks_id AUTO_INCREMENT PRIMARY KEY, Round INT, Overall INT, Player VARCHAR, Nationality VARCHAR, Club team VARCHAR) CREATE TABLE possible_detached_objects (possible_detached_objects_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Diameter (km) VARCHAR, Perihelion (AU) INT, Aphelion (AU) INT, Year discovered INT, Discoverer(s) VARCHAR, Type VARCHAR) CREATE TABLE head-to-head_records_against_other_countries (head-to-head_records_against_other_countries_id AUTO_INCREMENT PRIMARY KEY, Games INT, Wins INT, Draws INT, Losses INT, Goals For INT, Goals Against INT, Goal Differential VARCHAR)  
SELECT COUNT % same-sex marriages FROM marriage_statistics WHERE Year = 2008